(!!!!!) (Best Pair) 5691 RCA red base black plates NOS 1956-1957 (2.2/2.3ma and 2.1/2.4ma)
(!!!!!) (Recommended 5 Star Single) 5751 GE "5 Star" NOS gray plates triple mica "U" getter 1956 (2.1/2.2ma)
(!!!!!) (Recommended Single) 421A=5998 Western Electric NOS 1984 (81ma and 94ma)
(!!!!) (Best Single 1957) JG-5751WA GE NOS black plates triple mica U getter halo 1957 (2.3/2.7ma) (High mA and Gm)
(!!!!) (Best Single) CV181=ECC32 Mullard black base black plates NOS 1950's (6.6/6.3ma)
(!!!!) (Recommended Pair) 6LQ6=6JE6C Sylvania NOS 1970 era (76ma and 77ma)
(!!!!) (Recommended Single) 2A3 RCA gray plates NOS 1960 (104ma)
(!!!!) (Recommended Single) CV181=ECC32 Mullard black base black plates used/tests like new 1950's (6.4/6.5ma)
(!!!!) (Recommended Single) CV181=ECC32 Mullard black base gray plates like new 1950's (5.2/5.3ma) (close Gm)
(!!!!) (Single) 6CG7 Tungsol used/good 1960 era black shield between plates (7ma/7ma)
(!!!) (Best 5-Star) 5814A=12AU7 GE Electronic Secretary "5 STAR" triple mica NOS 1960 (10.8/10.4ma) (Same Gm)
(!!!) (Best Single 1953) JG-5814 GE NOS "square getter halo" and "short wide ribbed dark black plates" 1953 in white box (11.0/12.5ma)
(!!!) (Best Single) 7025 Sylvania NOS 1970's (Gm=2200/2300 and 1.4/1.5ma)
(!!!) (Best Value Single) 5814A GE 5 STAR "O" getter NOS 1960's faded printing (9.6/11.8ma)
(!!!) (Good Value Single) 12AT7 Tungsol NOS 1960's (6.4/8.4ma)
(!!!) (Good Value) JG-5814A GE triple mica "U" getter halo like new 1955 in white box (8.8/9.6ma)
(!!!) (Recommended GE) JG-5814 GE NOS "square getter halo" and "short wide ribbed dark gray plates" 1953 in white box (9.6/10ma) 1-3% section balance
(!!!) (Recommended Pair) 12AT7 RCA gray plates NOS 1960's (7.2/8.0ma and 8.0/8.2ma)
(!!!) (Recommended Pair) 12AT7 RCA gray plates NOS 1974 (10.5/7.5ma and 10.8/8.2ma)
(!!!) (Recommended Pair) 5691 RCA red base gray plates 1968-1974 (2.2/2.4ma and 2.1/2.3ma)